Lock.



B. N. PIERSON.

LOOK.

APPLICATION FILED FEB.16, 1912.

1,042,263. Patented 0ct.22,1912.

fifg. Z;

ROY NEWTON PIERSON, OF MINNEAPOLIS, MINNESOTA.

LOCK.

Specification of Letters Patent.

Patented @et. 22,1212.

Application filed February 16, 1912. Serial No. 677,964.

To all whom it may concern:

Be it known that I, ROY N. PIERSON, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented new and useful Improvements in Locks, of which the following is a specification.

The present invention relates to looks for cocks or other valves.

In carrying out my invention it is my purpose to provide a simple and effective device for looking a gas cock or valve to prevent the surreptitious tampering therewith.

TVith the above recited objects in view, the invention resides in the construction, combination and arrangement of parts set forth in and falling within the scope of the appended claims.

In the drawing, Figure 1 is a side elevation of my improved lock in applied position upon a gas cock. Fig. 2 is a sectional view taken upon the line 22 of Fig. 3. Fig. 3 is a vertical sectional view taken centrally and vertically of the showing of Fig. 2, the lock being positioned upon the gas cock and part of the lat ter being shown in section. Fig. 4; is'a perspective view of the lock casing, the plate therefor being removed. Fig. 5 is a perspective view of the sliding member of the lock.

Referring now to the drawings in detail the numeral 1 designates an ordinary gas cook. This cock is provided with the usual valve 2 the same having its lower extremity provided with a reduced threaded portion which is adapted to receive the usual nut 3. The valve is cone-shaped and has its up per extremity formed with a rectangular portion 4, which is adapted for the reception of a wrench or handle whereby the valve may be rotated within the cock.

The numeral 5 designates the improved lock. This lock comprises essentially a pair of members designated respectively by the numerals 6 and 7. The member 6, which may be termed the casing for the lock is of an 'L-shaped construction having one of its offset members provided with a rectangular opening which is adapted to engage with the rectangular extension of the valve, while the opposite arm of the said casing has its edges up-set to provide oppositely arranged flanges S and 9. This member is also provided with a key hole opening 10. The second or sliding member of the lock also comprises an L-shaped element, one of the offset arms of which being formed with an opening which is adapted to surround the nut of the cock, while the second arm 10 is bifurcated, and the members formed thereby are provided. with teeth 11; the same being arranged upon the inner edges of the said members. The numeral 12 designates the plate for the look. This plate is adapted to be arranged between the offset sides or flanges provided upon the lock casing and to be secured thereto through the medium of a suitable screw 13. The casing is formed with a stud 14 which is arranged intermediate of and at a distance away from oppositely disposed pins 15 and 16. These pins are adapted to be received within suitable openings provided in locking dogs 17 and 18. Any number of dogs may be arranged upon the pins to corre spond with the bits of the key and each of the said dogs comprise an arcuate body portion which is disposed adjacent an opening 19 in the face plate and the said dogs are further provided upon what may be termed their outer faces with teeth 20. The dogs are further provided with flattened springs 21, and these springs are adapted to contact with the central stud of the casing to force the teeth of the dogs into engagement with the teeth of the bifurcated arms provided upon the sliding member of the lock.

From the above description, taken in connection with the accompanying drawing, the simplicity of the device as well as the advantages thereof, will, it is thought, commend themselves to those skilled in the art without further description.

Having thus described the invention,what I claim is 1. A lock for the valve of a gas cock or the like, comprising a substantially L-shaped casing having one of its arms provided with an opening to receive the wrench or handle extension of the valve of the cook, a second L-shaped member having one of its arms bifurcated and slidably mounted in the easing, the second arm of this L-shaped member being provided with an opening which is adapted to surround the nut of the valve, the bifurcated arm of the said member being provided with teeth, a plate for the lock casing, said plate being provided with spring pressed dogs, which are adapted to engage with the teeth of the bifurcated arm, and a key for operating the dogs to force the latter out of engagementwith the teeth substantially as described.

2. In combination with a cock having a valve provided with a wrench extension, of a lock for the valve, said lock comprising a pair of substantially L-shaped sections, one movable within the other, oflset arms of the said L-shaped members being provided with openings, one adapted to be inserted over the wrench extension of the valve and the second opening adapted to engage with the lower face of the valve, a plate for securing the sections together, the said plate being formed with a centrally arranged stud and with pins arranged a distance away from each side of the stud, one of the members of the lock being bifurcated and being provided with teeth, dogs upon the pins of the plate, said dogs having their outer faces provided with teeth which are adapted to co-aet with the teeth of the bifurcated members, each of the dogs being provided with springs which are adapted to contact with the stud and to exert a pressure to force the teeth of the dogs into engagement with the teeth of the bifurcated arms and one of the members of the lock being formed with a key opening which is arranged centrally of the dogs.

In testimony whereof I afiix my signature in presence of two witnesses.

ROY NEWTON PIERSON.

Witnesses:

R. H. WVELLs, A. H. RAND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

